The respiratory problem most common in smokers is_________?
Correct answer: B. emphysema
- A. tuberculosis
- B. emphysema
- C. asthma
- D. cancer
Explanation
Long-term smoking commonly causes emphysema, in which alveolar walls are destroyed, reducing respiratory surface area and impairing gas exchange. Cancer is also strongly associated with smoking, but emphysema is the characteristic chronic obstructive respiratory disease intended here.
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